Based on the characteristic of spectrum absorption of acetylene, an optical fiber detection system for methane gas is presented, which has reference channel and is for on line and real time detection.
基于乙炔气体的光谱吸收特性，采用一种带有参考通道的光纤乙炔气体在线实时检测系统。
2
This paper is the second part, which presents the characteristic of reflection and refraction coefficient spectrum at line boundary.
本文是第二部分，主要探讨了两类母线的接线情况下，线路边界的折、反射系数的频谱特征。
3
This paper introduces a power line modem chip SC1128 based on Spread Spectrum technique, analyzes it's characteristic and compare it with other modem chips.